Clock



FIG. 1 is a front view of a clock showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left end view thereof;

FIG. 6 is a right end view thereof; and

FIG. 7 is a perspective view thereof when the associated case is closed. 

The ornamental design for a clock, substantially as shown and described. 